A pregnancy test performed on the same date as a preventive service may be reported separately using the CPT code appropriate to the test (e.g., 81025, âUrine pregnancy test, by visual color comparison methodsâ) and a diagnosis code from the V72.4X series (pregnancy examination or test).
This process is called continental drift. The plates move because of convection currents in the Earth's mantle. These are driven by the heat produced by the decay of radioactive elements and heat left over from the formation of the Earth.
The theory of plate tectonics states that the plates of the earth move due to convection in the mantle. This is what brings continents together and apart. Plate Tectonics statâ¦es that Earth's crust and the outermost part of the mantle are mechanically connected to each other. This layer is broken into several plates that move about Earth's surface.